.NET Core 3.1.0 Preview 3

.NET Core 3.1.0 Preview 3 is available and https://github.com/dotnet/core/issues/3809 has been opened for discussion.

[Release Notes](https://github.com/dotnet/core/blob/master/release-notes/3.1/preview/3.1.0-preview3.md)
[Download](https://dotnet.microsoft.com/download/dotnet-core/3.1)

**Blog posts**

[.NET Core](https://devblogs.microsoft.com/dotnet/announcing-net-core-3-1-preview-3/)
[ASP.NET Core](https://devblogs.microsoft.com/aspnet/asp-net-core-updates-in-net-core-3-1-preview-3/)

Please report any issues you find with .NET Core 3.1 Preview 3, either responding to this issue, creating a new issue or creating a new issue in one of the following repos:

* [aspnet/Home](https://github.com/aspnet/Home) - for ASP.NET Core questions
* [aspnet/EntityFrameworkCore](https://github.com/aspnet/EntityFrameworkCore) - for Entity Framework Core questions
* [dotnet/cli](https://github.com/dotnet/cli/issues) - for CLI tools and questions
* [dotnet/corefx](https://github.com/dotnet/corefx/issues) - for API issues and questions
* [dotnet/coreclr](https://github.com/dotnet/coreclr/issues) - for runtime issues
* [dotnet/core-setup](https://github.com/dotnet/core-setup/issues) - for installer issues
* [dotnet/winforms](https://github.com/dotnet/winforms/issues) - for Winforms issues
* [dotnet/wpf](https://github.com/dotnet/wpf/issues) - for WPF issues
* [nuget/home](https://github.com/nuget/home/issues) - for NuGet questions and issues

This issue announces .NET Core 3.1.0 Preview 3 and links to the release notes, download page, and related blog posts. Read those linked resources first; the issue does not identify a change, file, test, or other completion criteria for a contribution.

Written by the indexing model from the issue text.